ω phase strengthened 1.2GPa metastable β titanium alloy with high ductility

Research output: Contribution to journalArticlepeer-review

Authors

Colleges, School and Institutes

External organisations

  • University of Sheffield

Abstract

This paper provides a novel approach for exploiting ω phase strengthening in a metastable β titanium alloy while retaining high ductility. The addition of 1 wt% Fe into our previously designed Ti-7Mo-3Cr alloy can efficiently control the growth of ω phase following air-cooling, resulting in a ultrahigh yield strength (Rp0.2of 1210 MPa) with large ductility (εf of 0.15). Microstructural analysis of deformed alloys showed that the growth of ω phase in the air-cooled Ti-7Mo-3Cr-1Fe alloy modified the deformation mechanism from {332} twinning and dislocation slip, in the water-quenched alloy, to localized dislocation plasticity in ω-void channels.

Details

Original languageEnglish
Pages (from-to)77-81
Number of pages4
JournalScripta Materialia
Volume162
Early online date7 Nov 2018
Publication statusPublished - 15 Mar 2019

Keywords

  • metastable beta titanium alloy, ω phase, strengthening, yield strength